153 lines
4.0 KiB
C++
153 lines
4.0 KiB
C++
/****************************************************************************
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* *
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* Project64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2012 Project64. All rights reserved. *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* *
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****************************************************************************/
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#pragma once
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#include <Common/LogClass.h>
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#include <Project64-core/N64System/Mips/RegisterClass.h>
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class CDebugTlb;
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__interface CTLB_CB
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{
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virtual void TLB_Mapped(uint32_t VAddr, uint32_t Len, uint32_t PAddr, bool bReadOnly) = 0;
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virtual void TLB_Unmaped(uint32_t VAddr, uint32_t Len) = 0;
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virtual void TLB_Changed() = 0;
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};
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#pragma warning(push)
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#pragma warning(disable : 4201) // warning C4201: nonstandard extension used : nameless struct/union
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class CTLB :
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protected CSystemRegisters
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{
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public:
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struct TLB_ENTRY
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{
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bool EntryDefined;
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union
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{
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uint32_t Value;
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uint8_t A[4];
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struct
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{
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unsigned zero : 13;
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unsigned Mask : 12;
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unsigned zero2 : 7;
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};
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} PageMask;
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union
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{
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uint32_t Value;
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uint8_t A[4];
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struct
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{
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unsigned ASID : 8;
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unsigned Zero : 4;
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unsigned G : 1;
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unsigned VPN2 : 19;
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};
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} EntryHi;
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union
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{
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uint32_t Value;
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uint8_t A[4];
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struct
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{
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unsigned GLOBAL : 1;
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unsigned V : 1;
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unsigned D : 1;
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unsigned C : 3;
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unsigned PFN : 20;
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unsigned ZERO : 6;
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};
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} EntryLo0;
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union
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{
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uint32_t Value;
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uint8_t A[4];
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struct
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{
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unsigned GLOBAL : 1;
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unsigned V : 1;
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unsigned D : 1;
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unsigned C : 3;
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unsigned PFN : 20;
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unsigned ZERO : 6;
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};
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} EntryLo1;
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};
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public:
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CTLB(CTLB_CB * CallBack);
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~CTLB();
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void Reset(bool InvalidateTLB);
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//Used by opcodes of the same name to manipulate the tlb (reads the registers)
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void Probe();
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void ReadEntry();
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void WriteEntry(int32_t index, bool Random);
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//See if a VAddr has an entry to translate to a PAddr
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bool AddressDefined(uint32_t VAddr);
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const TLB_ENTRY & TlbEntry(int32_t Entry) const
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{
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return m_tlb[Entry];
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}
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bool PAddrToVAddr(uint32_t PAddr, uint32_t & VAddr, uint32_t & Index);
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void RecordDifference(CLog &LogFile, const CTLB& rTLB);
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bool operator == (const CTLB& rTLB) const;
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bool operator != (const CTLB& rTLB) const;
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private:
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struct FASTTLB
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{
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uint32_t VSTART;
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uint32_t VEND;
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uint32_t PHYSSTART;
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uint32_t PHYSEND;
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uint32_t Length;
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bool VALID;
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bool DIRTY;
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bool GLOBAL;
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bool ValidEntry;
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bool Random;
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bool Probed;
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};
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friend class CDebugTlb; // enable debug window to read class
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CTLB_CB * const m_CB;
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TLB_ENTRY m_tlb[32];
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FASTTLB m_FastTlb[64];
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void SetupTLB_Entry(int32_t index, bool Random);
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private:
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CTLB(); // Disable default constructor
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CTLB(const CTLB&); // Disable copy constructor
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CTLB& operator=(const CTLB&); // Disable assignment
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};
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#pragma warning(pop)
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